Relation between crystallographic and magnetic chiralities in chiral helimagnets probed by polarized neutron scattering

2015 Fiscal Year Final Research Report

• Project/Area Number: 25390139
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Quantum beam science
• Research Institution: 一般財団法人総合科学研究機構(総合科学研究センター(総合科学研究室)及び東海事業センター(利用研究促進部))
• Principal Investigator: Ohishi Kazuki 一般財団法人総合科学研究機構(総合科学研究センター(総合科学研究室)及び東海事業, 中性子科学センター, 副主任研究員 (60414611)
• Co-Investigator(Renkei-kenkyūsha): KOUSAKA Yusuke 広島大学, 大学院理学研究科, 特任助教 (60406832)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: カイラル磁性体 / カイラル磁気構造 / カイラリティ / 中性子散乱 / 偏極中性子 / 中性子小角散乱

Outline of Final Research Achievements

The aim of this study is to clarify the relation between crystallographic chirality and that of magnetic structures by means of polarized neutron scattering. First, the polarized small angle neutron scattering experiments detected the higher harmonics in MnSi. By evaluating the difference in intensities between the up and down-spin incident neutrons, this result is well interpreted by formation of the left-handed chiral soliton lattice. Second, it revealed that there is a one to one relationship between the structural and magnetic handedness in CsCuCl3; namely the right-handed crystal structure has a right-handed spiral magnetic structure, and left-handed crystal has a left-handed spiral magnetic structure. In this way, we have succeeded to clarify the relation between crystallographic chirality and that of magnetic structures.

Free Research Field

物性物理学